21023020330211 has 2 divisors, whose sum is σ = 21023020330212. Its totient is φ = 21023020330210.

The previous prime is 21023020330171. The next prime is 21023020330217. The reversal of 21023020330211 is 11203302032012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023020330211 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21023020330217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511510165105 + 10511510165106.

It is an arithmetic number, because the mean of its divisors is an integer number (10511510165106).

Almost surely, 2^{21023020330211} is an apocalyptic number.

21023020330211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023020330211 is an equidigital number, since it uses as much as digits as its factorization.

21023020330211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21023020330211 its reverse (11203302032012), we get a palindrome (32226322362223).

The spelling of 21023020330211 in words is "twenty-one trillion, twenty-three billion, twenty million, three hundred thirty thousand, two hundred eleven".